<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <title>网络安全训练营</title>
</head>

<style>
    
    body{
        background-color: orange;
    }
</style>

<body>

    <a href="https://time.geekbang.org/">
        <img  src="/week1/ai.png"  title="极客时间" />
    </a>

    <hr/>
   
    <h2>&lt;a&gt; 极客时间 &lt;p&gt; </h2>

</body>
</html>